You sit in a time machine and travel to the far future. What you notice is that everything is powered by an invisible force. Cars are flying in the sky without any visible energy source. Homes are lit without any power line.

>There are eight planets in the solar system, the Sun being at the center of the solar system and the planets revolving around the Sun. Up till now 67 satellites (Moons) of the planets have been discovered. The solar system also contains asteroids, meteors and visiting comets.